My bet is that gaming journalism is held hostage to their readers, actually. A typical gamer does not care about elaborate in-depht knowledge about the game developement, they just want the screens, the features, the "awesoem". Their source for gaming news needs to deliver this stuff and guess what happens when you get too inquisitive aka "difficult to work with"? You get neglected when new stuff comes out. Whoever plays nice, gets the exclusive content access that they can deliver to their readers and reap the benefits. Whoever doesn't, gets nothing and waves their readers bye-bye when they change their source of news. And I don't blame the devs and publishers. That's what business is like, dirty and merciless. It works this way in every industry. I don't see many famous actors getting asked about their drunkard incidents, naked photos, etc. for instance. It's always the contentgiver that decides what content you get.
Codex is different regarding contentwhoring and it seems to me obvious as for why. Basically what Infinitron
said: Codex is not journalism. It's not a business, it's not a part of industry. And thus it's free of typical constraints of such, as well as of
it comes with. Codex is independent. But still I find it surprising that people somehow expect the gaming journalism to aim for Codex' level of honesty, integrity, dedication and prestige that comes with those. That's... not gonna happen and it was never meant to.
Same goes for developers. The higher you are in the industry, the more constraints you have to face to maintain your existance there.
IDK, maybe that's the obvious stuff, but those critical voices towards gaming journalism and gaming industry in general hint that some people are oblivious to how the world spins around and that not everybody can afford being dedicated to the cause.